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Property And Equipment, Net (Property And Equipment) (Details) (USD $)
In Thousands
Dec. 31, 2010
Dec. 31, 2009
Property And Equipment, Net [Abstract]  
Land$ 18,405$ 16,206
Buildings and leasehold improvements476,057368,341
Equipment539,518536,328
Computer software1,025,4681,013,461
Property and equipment, gross2,059,4481,934,336
Accumulated depreciation(1,244,111)(1,255,194)
Property and equipment, net$ 815,337$ 679,142